194 Mr. H. Scott on 



feeding-hahit in the family Blepharoceridse. Kellogg {op. cit. 

 1903 and 1907) describes the ? ? o£ Blepharocera tenuipes, 

 Walker {capitata, Loew), as feeding on tiny Chironomid 

 midges, which they captured on the wing, lacerated with their 

 mandibles, and from which they then absorbed the body- 

 juices ; but tiie (J c? ? which have no mandibles, were absent 

 from the feeding-ground, and probably have a totally 

 different foot-habit. On the other hand, Hetschko {op. cit.) 

 in Corsica observed both sexes of Apistomyia elegans, 

 Bigot, feeding together on nectar, thereby confirming 

 the earlier observations of Sclinuse, part of which Kellogg 

 {op. cit. 1907, p. 5) doubted. The Apistomyia were seen on 

 a number of occasions, at all hours of the day, feeding 

 almost exclusively on the flowers of a Composite {Heli- 

 chrysum inicrophyllum) ; though present in numbers, tlie 

 majority appear to have been ? ? . None were ever 

 observed to capture other insects, and no insects which they 

 could have captured were present on the flowers. Apisto- 

 myia belongs to a different division of the family to either 

 Blepharocera or Paltostoma, but like them it shows great 

 dissimilarity between the S and $ mouth-parts, ouly the 

 ? possessing mandibles, and there being other differences. 

 Yet Hetschko found both sexes exhibiting the nectar-feeding 

 habit at the same time. 



S Genital Armature. — This is shown in PI. X. fig. 13, 

 viewed as a transparency from the ventral side. The termiucil 

 dorsal segment of the body is rather deeply and widely 

 sinuate-emarginate in the middle behind, and its hind angles 

 are rounded ; at its sides and hind angles it bears long setae 

 directed outwards ; at its sides, too, it is strongly deflexed, 

 and the deflexed portions bear long setse directed inwards 

 towards the middle line. Veutrally are articulated the two 

 stout claspers, each bent inwards somewhat towards the 

 apex, which is blunt, and each bearing on its outer side a 

 short projection ending in a stout spine, somewhat recalling 

 a very small branch of au antler. Between the bases of the 

 claspers projects a small subtriangular plate with rounded 

 apex, just exceeding in length the base of the sinuation of 

 the dorsal plate. These parts all agree closely with those 

 of Williston's co-type. 



Legs, Tarsi. — The legs are thickly covered with blackish 

 set£e. The hind tibiae have the single apical spur character- 

 istic of the genus. The tarsi (PI. X. fig. 14) have a 

 group of stout black spines underneath the basal part of 

 the terminal joint ; each of the claws has a moderately 

 long stout process on its ventral side near the base. The 



